drivers/gpu/drm/tegra/drm.c

   1 /*
   2  * Copyright (C) 2012 Avionic Design GmbH
   3  * Copyright (C) 2012-2016 NVIDIA CORPORATION.  All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  */
   9
  10 #include <linux/bitops.h>
  11 #include <linux/host1x.h>
  12 #include <linux/idr.h>
  13 #include <linux/iommu.h>
  14
  15 #include <drm/drm_atomic.h>
  16 #include <drm/drm_atomic_helper.h>
  17
  18 #include "drm.h"
  19 #include "gem.h"
  20
  21 #define DRIVER_NAME "tegra"
  22 #define DRIVER_DESC "NVIDIA Tegra graphics"
  23 #define DRIVER_DATE "20120330"
  24 #define DRIVER_MAJOR 0
  25 #define DRIVER_MINOR 0
  26 #define DRIVER_PATCHLEVEL 0
  27
  28 #define CARVEOUT_SZ SZ_64M
  29 #define CDMA_GATHER_FETCHES_MAX_NB 16383
  30
  31 struct tegra_drm_file {
  32         struct idr contexts;
  33         struct mutex lock;
  34 };
  35
  36 static int tegra_atomic_check(struct drm_device *drm,
  37                               struct drm_atomic_state *state)
  38 {
  39         int err;
  40
  41         err = drm_atomic_helper_check(drm, state);
  42         if (err < 0)
  43                 return err;
  44
  45         return tegra_display_hub_atomic_check(drm, state);
  46 }
  47
  48 static const struct drm_mode_config_funcs tegra_drm_mode_config_funcs = {
  49         .fb_create = tegra_fb_create,
  50 #ifdef CONFIG_DRM_FBDEV_EMULATION
  51         .output_poll_changed = drm_fb_helper_output_poll_changed,
  52 #endif
  53         .atomic_check = tegra_atomic_check,
  54         .atomic_commit = drm_atomic_helper_commit,
  55 };
  56
  57 static void tegra_atomic_commit_tail(struct drm_atomic_state *old_state)
  58 {
  59         struct drm_device *drm = old_state->dev;
  60         struct tegra_drm *tegra = drm->dev_private;
  61
  62         if (tegra->hub) {
  63                 drm_atomic_helper_commit_modeset_disables(drm, old_state);
  64                 tegra_display_hub_atomic_commit(drm, old_state);
  65                 drm_atomic_helper_commit_planes(drm, old_state, 0);
  66                 drm_atomic_helper_commit_modeset_enables(drm, old_state);
  67                 drm_atomic_helper_commit_hw_done(old_state);
  68                 drm_atomic_helper_wait_for_vblanks(drm, old_state);
  69                 drm_atomic_helper_cleanup_planes(drm, old_state);
  70         } else {
  71                 drm_atomic_helper_commit_tail_rpm(old_state);
  72         }
  73 }
  74
  75 static const struct drm_mode_config_helper_funcs
  76 tegra_drm_mode_config_helpers = {
  77         .atomic_commit_tail = tegra_atomic_commit_tail,
  78 };
  79
  80 static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
  81 {
  82         struct host1x_device *device = to_host1x_device(drm->dev);
  83         struct tegra_drm *tegra;
  84         int err;
  85
  86         tegra = kzalloc(sizeof(*tegra), GFP_KERNEL);
  87         if (!tegra)
  88                 return -ENOMEM;
  89
  90         if (iommu_present(&platform_bus_type)) {
  91                 u64 carveout_start, carveout_end, gem_start, gem_end;
  92                 struct iommu_domain_geometry *geometry;
  93                 unsigned long order;
  94
  95                 tegra->domain = iommu_domain_alloc(&platform_bus_type);
  96                 if (!tegra->domain) {
  97                         err = -ENOMEM;
  98                         goto free;
  99                 }
 100
 101                 err = iova_cache_get();
 102                 if (err < 0)
 103                         goto domain;
 104
 105                 geometry = &tegra->domain->geometry;
 106                 gem_start = geometry->aperture_start;
 107                 gem_end = geometry->aperture_end - CARVEOUT_SZ;
 108                 carveout_start = gem_end + 1;
 109                 carveout_end = geometry->aperture_end;
 110
 111                 order = __ffs(tegra->domain->pgsize_bitmap);
 112                 init_iova_domain(&tegra->carveout.domain, 1UL << order,
 113                                  carveout_start >> order);
 114
 115                 tegra->carveout.shift = iova_shift(&tegra->carveout.domain);
 116                 tegra->carveout.limit = carveout_end >> tegra->carveout.shift;
 117
 118                 drm_mm_init(&tegra->mm, gem_start, gem_end - gem_start + 1);
 119                 mutex_init(&tegra->mm_lock);
 120
 121                 DRM_DEBUG("IOMMU apertures:\n");
 122                 DRM_DEBUG("  GEM: %#llx-%#llx\n", gem_start, gem_end);
 123                 DRM_DEBUG("  Carveout: %#llx-%#llx\n", carveout_start,
 124                           carveout_end);
 125         }
 126
 127         mutex_init(&tegra->clients_lock);
 128         INIT_LIST_HEAD(&tegra->clients);
 129
 130         drm->dev_private = tegra;
 131         tegra->drm = drm;
 132
 133         drm_mode_config_init(drm);
 134
 135         drm->mode_config.min_width = 0;
 136         drm->mode_config.min_height = 0;
 137
 138         drm->mode_config.max_width = 4096;
 139         drm->mode_config.max_height = 4096;
 140
 141         drm->mode_config.allow_fb_modifiers = true;
 142
 143         drm->mode_config.normalize_zpos = true;
 144
 145         drm->mode_config.funcs = &tegra_drm_mode_config_funcs;
 146         drm->mode_config.helper_private = &tegra_drm_mode_config_helpers;
 147
 148         err = tegra_drm_fb_prepare(drm);
 149         if (err < 0)
 150                 goto config;
 151
 152         drm_kms_helper_poll_init(drm);
 153
 154         err = host1x_device_init(device);
 155         if (err < 0)
 156                 goto fbdev;
 157
 158         if (tegra->hub) {
 159                 err = tegra_display_hub_prepare(tegra->hub);
 160                 if (err < 0)
 161                         goto device;
 162         }
 163
 164         /*
 165          * We don't use the drm_irq_install() helpers provided by the DRM
 166          * core, so we need to set this manually in order to allow the
 167          * DRM_IOCTL_WAIT_VBLANK to operate correctly.
 168          */
 169         drm->irq_enabled = true;
 170
 171         /* syncpoints are used for full 32-bit hardware VBLANK counters */
 172         drm->max_vblank_count = 0xffffffff;
 173
 174         err = drm_vblank_init(drm, drm->mode_config.num_crtc);
 175         if (err < 0)
 176                 goto hub;
 177
 178         drm_mode_config_reset(drm);
 179
 180         err = tegra_drm_fb_init(drm);
 181         if (err < 0)
 182                 goto hub;
 183
 184         return 0;
 185
 186 hub:
 187         if (tegra->hub)
 188                 tegra_display_hub_cleanup(tegra->hub);
 189 device:
 190         host1x_device_exit(device);
 191 fbdev:
 192         drm_kms_helper_poll_fini(drm);
 193         tegra_drm_fb_free(drm);
 194 config:
 195         drm_mode_config_cleanup(drm);
 196
 197         if (tegra->domain) {
 198                 mutex_destroy(&tegra->mm_lock);
 199                 drm_mm_takedown(&tegra->mm);
 200                 put_iova_domain(&tegra->carveout.domain);
 201                 iova_cache_put();
 202         }
 203 domain:
 204         if (tegra->domain)
 205                 iommu_domain_free(tegra->domain);
 206 free:
 207         kfree(tegra);
 208         return err;
 209 }
 210
 211 static void tegra_drm_unload(struct drm_device *drm)
 212 {
 213         struct host1x_device *device = to_host1x_device(drm->dev);
 214         struct tegra_drm *tegra = drm->dev_private;
 215         int err;
 216
 217         drm_kms_helper_poll_fini(drm);
 218         tegra_drm_fb_exit(drm);
 219         drm_atomic_helper_shutdown(drm);
 220         drm_mode_config_cleanup(drm);
 221
 222         err = host1x_device_exit(device);
 223         if (err < 0)
 224                 return;
 225
 226         if (tegra->domain) {
 227                 mutex_destroy(&tegra->mm_lock);
 228                 drm_mm_takedown(&tegra->mm);
 229                 put_iova_domain(&tegra->carveout.domain);
 230                 iova_cache_put();
 231                 iommu_domain_free(tegra->domain);
 232         }
 233
 234         kfree(tegra);
 235 }
 236
 237 static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp)
 238 {
 239         struct tegra_drm_file *fpriv;
 240
 241         fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL);
 242         if (!fpriv)
 243                 return -ENOMEM;
 244
 245         idr_init(&fpriv->contexts);
 246         mutex_init(&fpriv->lock);
 247         filp->driver_priv = fpriv;
 248
 249         return 0;
 250 }
 251
 252 static void tegra_drm_context_free(struct tegra_drm_context *context)
 253 {
 254         context->client->ops->close_channel(context);
 255         kfree(context);
 256 }
 257
 258 static struct host1x_bo *
 259 host1x_bo_lookup(struct drm_file *file, u32 handle)
 260 {
 261         struct drm_gem_object *gem;
 262         struct tegra_bo *bo;
 263
 264         gem = drm_gem_object_lookup(file, handle);
 265         if (!gem)
 266                 return NULL;
 267
 268         bo = to_tegra_bo(gem);
 269         return &bo->base;
 270 }
 271
 272 static int host1x_reloc_copy_from_user(struct host1x_reloc *dest,
 273                                        struct drm_tegra_reloc __user *src,
 274                                        struct drm_device *drm,
 275                                        struct drm_file *file)
 276 {
 277         u32 cmdbuf, target;
 278         int err;
 279
 280         err = get_user(cmdbuf, &src->cmdbuf.handle);
 281         if (err < 0)
 282                 return err;
 283
 284         err = get_user(dest->cmdbuf.offset, &src->cmdbuf.offset);
 285         if (err < 0)
 286                 return err;
 287
 288         err = get_user(target, &src->target.handle);
 289         if (err < 0)
 290                 return err;
 291
 292         err = get_user(dest->target.offset, &src->target.offset);
 293         if (err < 0)
 294                 return err;
 295
 296         err = get_user(dest->shift, &src->shift);
 297         if (err < 0)
 298                 return err;
 299
 300         dest->cmdbuf.bo = host1x_bo_lookup(file, cmdbuf);
 301         if (!dest->cmdbuf.bo)
 302                 return -ENOENT;
 303
 304         dest->target.bo = host1x_bo_lookup(file, target);
 305         if (!dest->target.bo)
 306                 return -ENOENT;
 307
 308         return 0;
 309 }
 310
 311 int tegra_drm_submit(struct tegra_drm_context *context,
 312                      struct drm_tegra_submit *args, struct drm_device *drm,
 313                      struct drm_file *file)
 314 {
 315         struct host1x_client *client = &context->client->base;
 316         unsigned int num_cmdbufs = args->num_cmdbufs;
 317         unsigned int num_relocs = args->num_relocs;
 318         struct drm_tegra_cmdbuf __user *user_cmdbufs;
 319         struct drm_tegra_reloc __user *user_relocs;
 320         struct drm_tegra_syncpt __user *user_syncpt;
 321         struct drm_tegra_syncpt syncpt;
 322         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
 323         struct drm_gem_object **refs;
 324         struct host1x_syncpt *sp;
 325         struct host1x_job *job;
 326         unsigned int num_refs;
 327         int err;
 328
 329         user_cmdbufs = u64_to_user_ptr(args->cmdbufs);
 330         user_relocs = u64_to_user_ptr(args->relocs);
 331         user_syncpt = u64_to_user_ptr(args->syncpts);
 332
 333         /* We don't yet support other than one syncpt_incr struct per submit */
 334         if (args->num_syncpts != 1)
 335                 return -EINVAL;
 336
 337         /* We don't yet support waitchks */
 338         if (args->num_waitchks != 0)
 339                 return -EINVAL;
 340
 341         job = host1x_job_alloc(context->channel, args->num_cmdbufs,
 342                                args->num_relocs);
 343         if (!job)
 344                 return -ENOMEM;
 345
 346         job->num_relocs = args->num_relocs;
 347         job->client = client;
 348         job->class = client->class;
 349         job->serialize = true;
 350
 351         /*
 352          * Track referenced BOs so that they can be unreferenced after the
 353          * submission is complete.
 354          */
 355         num_refs = num_cmdbufs + num_relocs * 2;
 356
 357         refs = kmalloc_array(num_refs, sizeof(*refs), GFP_KERNEL);
 358         if (!refs) {
 359                 err = -ENOMEM;
 360                 goto put;
 361         }
 362
 363         /* reuse as an iterator later */
 364         num_refs = 0;
 365
 366         while (num_cmdbufs) {
 367                 struct drm_tegra_cmdbuf cmdbuf;
 368                 struct host1x_bo *bo;
 369                 struct tegra_bo *obj;
 370                 u64 offset;
 371
 372                 if (copy_from_user(&cmdbuf, user_cmdbufs, sizeof(cmdbuf))) {
 373                         err = -EFAULT;
 374                         goto fail;
 375                 }
 376
 377                 /*
 378                  * The maximum number of CDMA gather fetches is 16383, a higher
 379                  * value means the words count is malformed.
 380                  */
 381                 if (cmdbuf.words > CDMA_GATHER_FETCHES_MAX_NB) {
 382                         err = -EINVAL;
 383                         goto fail;
 384                 }
 385
 386                 bo = host1x_bo_lookup(file, cmdbuf.handle);
 387                 if (!bo) {
 388                         err = -ENOENT;
 389                         goto fail;
 390                 }
 391
 392                 offset = (u64)cmdbuf.offset + (u64)cmdbuf.words * sizeof(u32);
 393                 obj = host1x_to_tegra_bo(bo);
 394                 refs[num_refs++] = &obj->gem;
 395
 396                 /*
 397                  * Gather buffer base address must be 4-bytes aligned,
 398                  * unaligned offset is malformed and cause commands stream
 399                  * corruption on the buffer address relocation.
 400                  */
 401                 if (offset & 3 || offset > obj->gem.size) {
 402                         err = -EINVAL;
 403                         goto fail;
 404                 }
 405
 406                 host1x_job_add_gather(job, bo, cmdbuf.words, cmdbuf.offset);
 407                 num_cmdbufs--;
 408                 user_cmdbufs++;
 409         }
 410
 411         /* copy and resolve relocations from submit */
 412         while (num_relocs--) {
 413                 struct host1x_reloc *reloc;
 414                 struct tegra_bo *obj;
 415
 416                 err = host1x_reloc_copy_from_user(&job->relocs[num_relocs],
 417                                                   &user_relocs[num_relocs], drm,
 418                                                   file);
 419                 if (err < 0)
 420                         goto fail;
 421
 422                 reloc = &job->relocs[num_relocs];
 423                 obj = host1x_to_tegra_bo(reloc->cmdbuf.bo);
 424                 refs[num_refs++] = &obj->gem;
 425
 426                 /*
 427                  * The unaligned cmdbuf offset will cause an unaligned write
 428                  * during of the relocations patching, corrupting the commands
 429                  * stream.
 430                  */
 431                 if (reloc->cmdbuf.offset & 3 ||
 432                     reloc->cmdbuf.offset >= obj->gem.size) {
 433                         err = -EINVAL;
 434                         goto fail;
 435                 }
 436
 437                 obj = host1x_to_tegra_bo(reloc->target.bo);
 438                 refs[num_refs++] = &obj->gem;
 439
 440                 if (reloc->target.offset >= obj->gem.size) {
 441                         err = -EINVAL;
 442                         goto fail;
 443                 }
 444         }
 445
 446         if (copy_from_user(&syncpt, user_syncpt, sizeof(syncpt))) {
 447                 err = -EFAULT;
 448                 goto fail;
 449         }
 450
 451         /* check whether syncpoint ID is valid */
 452         sp = host1x_syncpt_get(host1x, syncpt.id);
 453         if (!sp) {
 454                 err = -ENOENT;
 455                 goto fail;
 456         }
 457
 458         job->is_addr_reg = context->client->ops->is_addr_reg;
 459         job->is_valid_class = context->client->ops->is_valid_class;
 460         job->syncpt_incrs = syncpt.incrs;
 461         job->syncpt_id = syncpt.id;
 462         job->timeout = 10000;
 463
 464         if (args->timeout && args->timeout < 10000)
 465                 job->timeout = args->timeout;
 466
 467         err = host1x_job_pin(job, context->client->base.dev);
 468         if (err)
 469                 goto fail;
 470
 471         err = host1x_job_submit(job);
 472         if (err) {
 473                 host1x_job_unpin(job);
 474                 goto fail;
 475         }
 476
 477         args->fence = job->syncpt_end;
 478
 479 fail:
 480         while (num_refs--)
 481                 drm_gem_object_put_unlocked(refs[num_refs]);
 482
 483         kfree(refs);
 484
 485 put:
 486         host1x_job_put(job);
 487         return err;
 488 }
 489
 490
 491 #ifdef CONFIG_DRM_TEGRA_STAGING
 492 static int tegra_gem_create(struct drm_device *drm, void *data,
 493                             struct drm_file *file)
 494 {
 495         struct drm_tegra_gem_create *args = data;
 496         struct tegra_bo *bo;
 497
 498         bo = tegra_bo_create_with_handle(file, drm, args->size, args->flags,
 499                                          &args->handle);
 500         if (IS_ERR(bo))
 501                 return PTR_ERR(bo);
 502
 503         return 0;
 504 }
 505
 506 static int tegra_gem_mmap(struct drm_device *drm, void *data,
 507                           struct drm_file *file)
 508 {
 509         struct drm_tegra_gem_mmap *args = data;
 510         struct drm_gem_object *gem;
 511         struct tegra_bo *bo;
 512
 513         gem = drm_gem_object_lookup(file, args->handle);
 514         if (!gem)
 515                 return -EINVAL;
 516
 517         bo = to_tegra_bo(gem);
 518
 519         args->offset = drm_vma_node_offset_addr(&bo->gem.vma_node);
 520
 521         drm_gem_object_put_unlocked(gem);
 522
 523         return 0;
 524 }
 525
 526 static int tegra_syncpt_read(struct drm_device *drm, void *data,
 527                              struct drm_file *file)
 528 {
 529         struct host1x *host = dev_get_drvdata(drm->dev->parent);
 530         struct drm_tegra_syncpt_read *args = data;
 531         struct host1x_syncpt *sp;
 532
 533         sp = host1x_syncpt_get(host, args->id);
 534         if (!sp)
 535                 return -EINVAL;
 536
 537         args->value = host1x_syncpt_read_min(sp);
 538         return 0;
 539 }
 540
 541 static int tegra_syncpt_incr(struct drm_device *drm, void *data,
 542                              struct drm_file *file)
 543 {
 544         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
 545         struct drm_tegra_syncpt_incr *args = data;
 546         struct host1x_syncpt *sp;
 547
 548         sp = host1x_syncpt_get(host1x, args->id);
 549         if (!sp)
 550                 return -EINVAL;
 551
 552         return host1x_syncpt_incr(sp);
 553 }
 554
 555 static int tegra_syncpt_wait(struct drm_device *drm, void *data,
 556                              struct drm_file *file)
 557 {
 558         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
 559         struct drm_tegra_syncpt_wait *args = data;
 560         struct host1x_syncpt *sp;
 561
 562         sp = host1x_syncpt_get(host1x, args->id);
 563         if (!sp)
 564                 return -EINVAL;
 565
 566         return host1x_syncpt_wait(sp, args->thresh,
 567                                   msecs_to_jiffies(args->timeout),
 568                                   &args->value);
 569 }
 570
 571 static int tegra_client_open(struct tegra_drm_file *fpriv,
 572                              struct tegra_drm_client *client,
 573                              struct tegra_drm_context *context)
 574 {
 575         int err;
 576
 577         err = client->ops->open_channel(client, context);
 578         if (err < 0)
 579                 return err;
 580
 581         err = idr_alloc(&fpriv->contexts, context, 1, 0, GFP_KERNEL);
 582         if (err < 0) {
 583                 client->ops->close_channel(context);
 584                 return err;
 585         }
 586
 587         context->client = client;
 588         context->id = err;
 589
 590         return 0;
 591 }
 592
 593 static int tegra_open_channel(struct drm_device *drm, void *data,
 594                               struct drm_file *file)
 595 {
 596         struct tegra_drm_file *fpriv = file->driver_priv;
 597         struct tegra_drm *tegra = drm->dev_private;
 598         struct drm_tegra_open_channel *args = data;
 599         struct tegra_drm_context *context;
 600         struct tegra_drm_client *client;
 601         int err = -ENODEV;
 602
 603         context = kzalloc(sizeof(*context), GFP_KERNEL);
 604         if (!context)
 605                 return -ENOMEM;
 606
 607         mutex_lock(&fpriv->lock);
 608
 609         list_for_each_entry(client, &tegra->clients, list)
 610                 if (client->base.class == args->client) {
 611                         err = tegra_client_open(fpriv, client, context);
 612                         if (err < 0)
 613                                 break;
 614
 615                         args->context = context->id;
 616                         break;
 617                 }
 618
 619         if (err < 0)
 620                 kfree(context);
 621
 622         mutex_unlock(&fpriv->lock);
 623         return err;
 624 }
 625
 626 static int tegra_close_channel(struct drm_device *drm, void *data,
 627                                struct drm_file *file)
 628 {
 629         struct tegra_drm_file *fpriv = file->driver_priv;
 630         struct drm_tegra_close_channel *args = data;
 631         struct tegra_drm_context *context;
 632         int err = 0;
 633
 634         mutex_lock(&fpriv->lock);
 635
 636         context = idr_find(&fpriv->contexts, args->context);
 637         if (!context) {
 638                 err = -EINVAL;
 639                 goto unlock;
 640         }
 641
 642         idr_remove(&fpriv->contexts, context->id);
 643         tegra_drm_context_free(context);
 644
 645 unlock:
 646         mutex_unlock(&fpriv->lock);
 647         return err;
 648 }
 649
 650 static int tegra_get_syncpt(struct drm_device *drm, void *data,
 651                             struct drm_file *file)
 652 {
 653         struct tegra_drm_file *fpriv = file->driver_priv;
 654         struct drm_tegra_get_syncpt *args = data;
 655         struct tegra_drm_context *context;
 656         struct host1x_syncpt *syncpt;
 657         int err = 0;
 658
 659         mutex_lock(&fpriv->lock);
 660
 661         context = idr_find(&fpriv->contexts, args->context);
 662         if (!context) {
 663                 err = -ENODEV;
 664                 goto unlock;
 665         }
 666
 667         if (args->index >= context->client->base.num_syncpts) {
 668                 err = -EINVAL;
 669                 goto unlock;
 670         }
 671
 672         syncpt = context->client->base.syncpts[args->index];
 673         args->id = host1x_syncpt_id(syncpt);
 674
 675 unlock:
 676         mutex_unlock(&fpriv->lock);
 677         return err;
 678 }
 679
 680 static int tegra_submit(struct drm_device *drm, void *data,
 681                         struct drm_file *file)
 682 {
 683         struct tegra_drm_file *fpriv = file->driver_priv;
 684         struct drm_tegra_submit *args = data;
 685         struct tegra_drm_context *context;
 686         int err;
 687
 688         mutex_lock(&fpriv->lock);
 689
 690         context = idr_find(&fpriv->contexts, args->context);
 691         if (!context) {
 692                 err = -ENODEV;
 693                 goto unlock;
 694         }
 695
 696         err = context->client->ops->submit(context, args, drm, file);
 697
 698 unlock:
 699         mutex_unlock(&fpriv->lock);
 700         return err;
 701 }
 702
 703 static int tegra_get_syncpt_base(struct drm_device *drm, void *data,
 704                                  struct drm_file *file)
 705 {
 706         struct tegra_drm_file *fpriv = file->driver_priv;
 707         struct drm_tegra_get_syncpt_base *args = data;
 708         struct tegra_drm_context *context;
 709         struct host1x_syncpt_base *base;
 710         struct host1x_syncpt *syncpt;
 711         int err = 0;
 712
 713         mutex_lock(&fpriv->lock);
 714
 715         context = idr_find(&fpriv->contexts, args->context);
 716         if (!context) {
 717                 err = -ENODEV;
 718                 goto unlock;
 719         }
 720
 721         if (args->syncpt >= context->client->base.num_syncpts) {
 722                 err = -EINVAL;
 723                 goto unlock;
 724         }
 725
 726         syncpt = context->client->base.syncpts[args->syncpt];
 727
 728         base = host1x_syncpt_get_base(syncpt);
 729         if (!base) {
 730                 err = -ENXIO;
 731                 goto unlock;
 732         }
 733
 734         args->id = host1x_syncpt_base_id(base);
 735
 736 unlock:
 737         mutex_unlock(&fpriv->lock);
 738         return err;
 739 }
 740
 741 static int tegra_gem_set_tiling(struct drm_device *drm, void *data,
 742                                 struct drm_file *file)
 743 {
 744         struct drm_tegra_gem_set_tiling *args = data;
 745         enum tegra_bo_tiling_mode mode;
 746         struct drm_gem_object *gem;
 747         unsigned long value = 0;
 748         struct tegra_bo *bo;
 749
 750         switch (args->mode) {
 751         case DRM_TEGRA_GEM_TILING_MODE_PITCH:
 752                 mode = TEGRA_BO_TILING_MODE_PITCH;
 753
 754                 if (args->value != 0)
 755                         return -EINVAL;
 756
 757                 break;
 758
 759         case DRM_TEGRA_GEM_TILING_MODE_TILED:
 760                 mode = TEGRA_BO_TILING_MODE_TILED;
 761
 762                 if (args->value != 0)
 763                         return -EINVAL;
 764
 765                 break;
 766
 767         case DRM_TEGRA_GEM_TILING_MODE_BLOCK:
 768                 mode = TEGRA_BO_TILING_MODE_BLOCK;
 769
 770                 if (args->value > 5)
 771                         return -EINVAL;
 772
 773                 value = args->value;
 774                 break;
 775
 776         default:
 777                 return -EINVAL;
 778         }
 779
 780         gem = drm_gem_object_lookup(file, args->handle);
 781         if (!gem)
 782                 return -ENOENT;
 783
 784         bo = to_tegra_bo(gem);
 785
 786         bo->tiling.mode = mode;
 787         bo->tiling.value = value;
 788
 789         drm_gem_object_put_unlocked(gem);
 790
 791         return 0;
 792 }
 793
 794 static int tegra_gem_get_tiling(struct drm_device *drm, void *data,
 795                                 struct drm_file *file)
 796 {
 797         struct drm_tegra_gem_get_tiling *args = data;
 798         struct drm_gem_object *gem;
 799         struct tegra_bo *bo;
 800         int err = 0;
 801
 802         gem = drm_gem_object_lookup(file, args->handle);
 803         if (!gem)
 804                 return -ENOENT;
 805
 806         bo = to_tegra_bo(gem);
 807
 808         switch (bo->tiling.mode) {
 809         case TEGRA_BO_TILING_MODE_PITCH:
 810                 args->mode = DRM_TEGRA_GEM_TILING_MODE_PITCH;
 811                 args->value = 0;
 812                 break;
 813
 814         case TEGRA_BO_TILING_MODE_TILED:
 815                 args->mode = DRM_TEGRA_GEM_TILING_MODE_TILED;
 816                 args->value = 0;
 817                 break;
 818
 819         case TEGRA_BO_TILING_MODE_BLOCK:
 820                 args->mode = DRM_TEGRA_GEM_TILING_MODE_BLOCK;
 821                 args->value = bo->tiling.value;
 822                 break;
 823
 824         default:
 825                 err = -EINVAL;
 826                 break;
 827         }
 828
 829         drm_gem_object_put_unlocked(gem);
 830
 831         return err;
 832 }
 833
 834 static int tegra_gem_set_flags(struct drm_device *drm, void *data,
 835                                struct drm_file *file)
 836 {
 837         struct drm_tegra_gem_set_flags *args = data;
 838         struct drm_gem_object *gem;
 839         struct tegra_bo *bo;
 840
 841         if (args->flags & ~DRM_TEGRA_GEM_FLAGS)
 842                 return -EINVAL;
 843
 844         gem = drm_gem_object_lookup(file, args->handle);
 845         if (!gem)
 846                 return -ENOENT;
 847
 848         bo = to_tegra_bo(gem);
 849         bo->flags = 0;
 850
 851         if (args->flags & DRM_TEGRA_GEM_BOTTOM_UP)
 852                 bo->flags |= TEGRA_BO_BOTTOM_UP;
 853
 854         drm_gem_object_put_unlocked(gem);
 855
 856         return 0;
 857 }
 858
 859 static int tegra_gem_get_flags(struct drm_device *drm, void *data,
 860                                struct drm_file *file)
 861 {
 862         struct drm_tegra_gem_get_flags *args = data;
 863         struct drm_gem_object *gem;
 864         struct tegra_bo *bo;
 865
 866         gem = drm_gem_object_lookup(file, args->handle);
 867         if (!gem)
 868                 return -ENOENT;
 869
 870         bo = to_tegra_bo(gem);
 871         args->flags = 0;
 872
 873         if (bo->flags & TEGRA_BO_BOTTOM_UP)
 874                 args->flags |= DRM_TEGRA_GEM_BOTTOM_UP;
 875
 876         drm_gem_object_put_unlocked(gem);
 877
 878         return 0;
 879 }
 880 #endif
 881
 882 static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
 883 #ifdef CONFIG_DRM_TEGRA_STAGING
 884         DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create,
 885                           DRM_UNLOCKED | DRM_RENDER_ALLOW),
 886         DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap,
 887                           DRM_UNLOCKED | DRM_RENDER_ALLOW),
 888         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read,
 889                           DRM_UNLOCKED | DRM_RENDER_ALLOW),
 890         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr,
 891                           DRM_UNLOCKED | DRM_RENDER_ALLOW),
 892         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait,
 893                           DRM_UNLOCKED | DRM_RENDER_ALLOW),
 894         DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel,
 895                           DRM_UNLOCKED | DRM_RENDER_ALLOW),
 896         DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel,
 897                           DRM_UNLOCKED | DRM_RENDER_ALLOW),
 898         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt,
 899                           DRM_UNLOCKED | DRM_RENDER_ALLOW),
 900         DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit,
 901                           DRM_UNLOCKED | DRM_RENDER_ALLOW),
 902         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT_BASE, tegra_get_syncpt_base,
 903                           DRM_UNLOCKED | DRM_RENDER_ALLOW),
 904         DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_TILING, tegra_gem_set_tiling,
 905                           DRM_UNLOCKED | DRM_RENDER_ALLOW),
 906         DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_TILING, tegra_gem_get_tiling,
 907                           DRM_UNLOCKED | DRM_RENDER_ALLOW),
 908         DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_FLAGS, tegra_gem_set_flags,
 909                           DRM_UNLOCKED | DRM_RENDER_ALLOW),
 910         DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_FLAGS, tegra_gem_get_flags,
 911                           DRM_UNLOCKED | DRM_RENDER_ALLOW),
 912 #endif
 913 };
 914
 915 static const struct file_operations tegra_drm_fops = {
 916         .owner = THIS_MODULE,
 917         .open = drm_open,
 918         .release = drm_release,
 919         .unlocked_ioctl = drm_ioctl,
 920         .mmap = tegra_drm_mmap,
 921         .poll = drm_poll,
 922         .read = drm_read,
 923         .compat_ioctl = drm_compat_ioctl,
 924         .llseek = noop_llseek,
 925 };
 926
 927 static int tegra_drm_context_cleanup(int id, void *p, void *data)
 928 {
 929         struct tegra_drm_context *context = p;
 930
 931         tegra_drm_context_free(context);
 932
 933         return 0;
 934 }
 935
 936 static void tegra_drm_postclose(struct drm_device *drm, struct drm_file *file)
 937 {
 938         struct tegra_drm_file *fpriv = file->driver_priv;
 939
 940         mutex_lock(&fpriv->lock);
 941         idr_for_each(&fpriv->contexts, tegra_drm_context_cleanup, NULL);
 942         mutex_unlock(&fpriv->lock);
 943
 944         idr_destroy(&fpriv->contexts);
 945         mutex_destroy(&fpriv->lock);
 946         kfree(fpriv);
 947 }
 948
 949 #ifdef CONFIG_DEBUG_FS
 950 static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
 951 {
 952         struct drm_info_node *node = (struct drm_info_node *)s->private;
 953         struct drm_device *drm = node->minor->dev;
 954         struct drm_framebuffer *fb;
 955
 956         mutex_lock(&drm->mode_config.fb_lock);
 957
 958         list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
 959                 seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
 960                            fb->base.id, fb->width, fb->height,
 961                            fb->format->depth,
 962                            fb->format->cpp[0] * 8,
 963                            drm_framebuffer_read_refcount(fb));
 964         }
 965
 966         mutex_unlock(&drm->mode_config.fb_lock);
 967
 968         return 0;
 969 }
 970
 971 static int tegra_debugfs_iova(struct seq_file *s, void *data)
 972 {
 973         struct drm_info_node *node = (struct drm_info_node *)s->private;
 974         struct drm_device *drm = node->minor->dev;
 975         struct tegra_drm *tegra = drm->dev_private;
 976         struct drm_printer p = drm_seq_file_printer(s);
 977
 978         if (tegra->domain) {
 979                 mutex_lock(&tegra->mm_lock);
 980                 drm_mm_print(&tegra->mm, &p);
 981                 mutex_unlock(&tegra->mm_lock);
 982         }
 983
 984         return 0;
 985 }
 986
 987 static struct drm_info_list tegra_debugfs_list[] = {
 988         { "framebuffers", tegra_debugfs_framebuffers, 0 },
 989         { "iova", tegra_debugfs_iova, 0 },
 990 };
 991
 992 static int tegra_debugfs_init(struct drm_minor *minor)
 993 {
 994         return drm_debugfs_create_files(tegra_debugfs_list,
 995                                         ARRAY_SIZE(tegra_debugfs_list),
 996                                         minor->debugfs_root, minor);
 997 }
 998 #endif
 999
1000 static struct drm_driver tegra_drm_driver = {
1001         .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME |
1002                            DRIVER_ATOMIC | DRIVER_RENDER,
1003         .load = tegra_drm_load,
1004         .unload = tegra_drm_unload,
1005         .open = tegra_drm_open,
1006         .postclose = tegra_drm_postclose,
1007         .lastclose = drm_fb_helper_lastclose,
1008
1009 #if defined(CONFIG_DEBUG_FS)
1010         .debugfs_init = tegra_debugfs_init,
1011 #endif
1012
1013         .gem_free_object_unlocked = tegra_bo_free_object,
1014         .gem_vm_ops = &tegra_bo_vm_ops,
1015
1016         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
1017         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
1018         .gem_prime_export = tegra_gem_prime_export,
1019         .gem_prime_import = tegra_gem_prime_import,
1020
1021         .dumb_create = tegra_bo_dumb_create,
1022
1023         .ioctls = tegra_drm_ioctls,
1024         .num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
1025         .fops = &tegra_drm_fops,
1026
1027         .name = DRIVER_NAME,
1028         .desc = DRIVER_DESC,
1029         .date = DRIVER_DATE,
1030         .major = DRIVER_MAJOR,
1031         .minor = DRIVER_MINOR,
1032         .patchlevel = DRIVER_PATCHLEVEL,
1033 };
1034
1035 int tegra_drm_register_client(struct tegra_drm *tegra,
1036                               struct tegra_drm_client *client)
1037 {
1038         mutex_lock(&tegra->clients_lock);
1039         list_add_tail(&client->list, &tegra->clients);
1040         mutex_unlock(&tegra->clients_lock);
1041
1042         return 0;
1043 }
1044
1045 int tegra_drm_unregister_client(struct tegra_drm *tegra,
1046                                 struct tegra_drm_client *client)
1047 {
1048         mutex_lock(&tegra->clients_lock);
1049         list_del_init(&client->list);
1050         mutex_unlock(&tegra->clients_lock);
1051
1052         return 0;
1053 }
1054
1055 struct iommu_group *host1x_client_iommu_attach(struct host1x_client *client,
1056                                                bool shared)
1057 {
1058         struct drm_device *drm = dev_get_drvdata(client->parent);
1059         struct tegra_drm *tegra = drm->dev_private;
1060         struct iommu_group *group = NULL;
1061         int err;
1062
1063         if (tegra->domain) {
1064                 group = iommu_group_get(client->dev);
1065                 if (!group) {
1066                         dev_err(client->dev, "failed to get IOMMU group\n");
1067                         return ERR_PTR(-ENODEV);
1068                 }
1069
1070                 if (!shared || (shared && (group != tegra->group))) {
1071                         err = iommu_attach_group(tegra->domain, group);
1072                         if (err < 0) {
1073                                 iommu_group_put(group);
1074                                 return ERR_PTR(err);
1075                         }
1076
1077                         if (shared && !tegra->group)
1078                                 tegra->group = group;
1079                 }
1080         }
1081
1082         return group;
1083 }
1084
1085 void host1x_client_iommu_detach(struct host1x_client *client,
1086                                 struct iommu_group *group)
1087 {
1088         struct drm_device *drm = dev_get_drvdata(client->parent);
1089         struct tegra_drm *tegra = drm->dev_private;
1090
1091         if (group) {
1092                 if (group == tegra->group) {
1093                         iommu_detach_group(tegra->domain, group);
1094                         tegra->group = NULL;
1095                 }
1096
1097                 iommu_group_put(group);
1098         }
1099 }
1100
1101 void *tegra_drm_alloc(struct tegra_drm *tegra, size_t size, dma_addr_t *dma)
1102 {
1103         struct iova *alloc;
1104         void *virt;
1105         gfp_t gfp;
1106         int err;
1107
1108         if (tegra->domain)
1109                 size = iova_align(&tegra->carveout.domain, size);
1110         else
1111                 size = PAGE_ALIGN(size);
1112
1113         gfp = GFP_KERNEL | __GFP_ZERO;
1114         if (!tegra->domain) {
1115                 /*
1116                  * Many units only support 32-bit addresses, even on 64-bit
1117                  * SoCs. If there is no IOMMU to translate into a 32-bit IO
1118                  * virtual address space, force allocations to be in the
1119                  * lower 32-bit range.
1120                  */
1121                 gfp |= GFP_DMA;
1122         }
1123
1124         virt = (void *)__get_free_pages(gfp, get_order(size));
1125         if (!virt)
1126                 return ERR_PTR(-ENOMEM);
1127
1128         if (!tegra->domain) {
1129                 /*
1130                  * If IOMMU is disabled, devices address physical memory
1131                  * directly.
1132                  */
1133                 *dma = virt_to_phys(virt);
1134                 return virt;
1135         }
1136
1137         alloc = alloc_iova(&tegra->carveout.domain,
1138                            size >> tegra->carveout.shift,
1139                            tegra->carveout.limit, true);
1140         if (!alloc) {
1141                 err = -EBUSY;
1142                 goto free_pages;
1143         }
1144
1145         *dma = iova_dma_addr(&tegra->carveout.domain, alloc);
1146         err = iommu_map(tegra->domain, *dma, virt_to_phys(virt),
1147                         size, IOMMU_READ | IOMMU_WRITE);
1148         if (err < 0)
1149                 goto free_iova;
1150
1151         return virt;
1152
1153 free_iova:
1154         __free_iova(&tegra->carveout.domain, alloc);
1155 free_pages:
1156         free_pages((unsigned long)virt, get_order(size));
1157
1158         return ERR_PTR(err);
1159 }
1160
1161 void tegra_drm_free(struct tegra_drm *tegra, size_t size, void *virt,
1162                     dma_addr_t dma)
1163 {
1164         if (tegra->domain)
1165                 size = iova_align(&tegra->carveout.domain, size);
1166         else
1167                 size = PAGE_ALIGN(size);
1168
1169         if (tegra->domain) {
1170                 iommu_unmap(tegra->domain, dma, size);
1171                 free_iova(&tegra->carveout.domain,
1172                           iova_pfn(&tegra->carveout.domain, dma));
1173         }
1174
1175         free_pages((unsigned long)virt, get_order(size));
1176 }
1177
1178 static int host1x_drm_probe(struct host1x_device *dev)
1179 {
1180         struct drm_driver *driver = &tegra_drm_driver;
1181         struct drm_device *drm;
1182         int err;
1183
1184         drm = drm_dev_alloc(driver, &dev->dev);
1185         if (IS_ERR(drm))
1186                 return PTR_ERR(drm);
1187
1188         dev_set_drvdata(&dev->dev, drm);
1189
1190         err = drm_dev_register(drm, 0);
1191         if (err < 0)
1192                 goto unref;
1193
1194         return 0;
1195
1196 unref:
1197         drm_dev_unref(drm);
1198         return err;
1199 }
1200
1201 static int host1x_drm_remove(struct host1x_device *dev)
1202 {
1203         struct drm_device *drm = dev_get_drvdata(&dev->dev);
1204
1205         drm_dev_unregister(drm);
1206         drm_dev_unref(drm);
1207
1208         return 0;
1209 }
1210
1211 #ifdef CONFIG_PM_SLEEP
1212 static int host1x_drm_suspend(struct device *dev)
1213 {
1214         struct drm_device *drm = dev_get_drvdata(dev);
1215         struct tegra_drm *tegra = drm->dev_private;
1216
1217         drm_kms_helper_poll_disable(drm);
1218         tegra_drm_fb_suspend(drm);
1219
1220         tegra->state = drm_atomic_helper_suspend(drm);
1221         if (IS_ERR(tegra->state)) {
1222                 tegra_drm_fb_resume(drm);
1223                 drm_kms_helper_poll_enable(drm);
1224                 return PTR_ERR(tegra->state);
1225         }
1226
1227         return 0;
1228 }
1229
1230 static int host1x_drm_resume(struct device *dev)
1231 {
1232         struct drm_device *drm = dev_get_drvdata(dev);
1233         struct tegra_drm *tegra = drm->dev_private;
1234
1235         drm_atomic_helper_resume(drm, tegra->state);
1236         tegra_drm_fb_resume(drm);
1237         drm_kms_helper_poll_enable(drm);
1238
1239         return 0;
1240 }
1241 #endif
1242
1243 static SIMPLE_DEV_PM_OPS(host1x_drm_pm_ops, host1x_drm_suspend,
1244                          host1x_drm_resume);
1245
1246 static const struct of_device_id host1x_drm_subdevs[] = {
1247         { .compatible = "nvidia,tegra20-dc", },
1248         { .compatible = "nvidia,tegra20-hdmi", },
1249         { .compatible = "nvidia,tegra20-gr2d", },
1250         { .compatible = "nvidia,tegra20-gr3d", },
1251         { .compatible = "nvidia,tegra30-dc", },
1252         { .compatible = "nvidia,tegra30-hdmi", },
1253         { .compatible = "nvidia,tegra30-gr2d", },
1254         { .compatible = "nvidia,tegra30-gr3d", },
1255         { .compatible = "nvidia,tegra114-dsi", },
1256         { .compatible = "nvidia,tegra114-hdmi", },
1257         { .compatible = "nvidia,tegra114-gr3d", },
1258         { .compatible = "nvidia,tegra124-dc", },
1259         { .compatible = "nvidia,tegra124-sor", },
1260         { .compatible = "nvidia,tegra124-hdmi", },
1261         { .compatible = "nvidia,tegra124-dsi", },
1262         { .compatible = "nvidia,tegra124-vic", },
1263         { .compatible = "nvidia,tegra132-dsi", },
1264         { .compatible = "nvidia,tegra210-dc", },
1265         { .compatible = "nvidia,tegra210-dsi", },
1266         { .compatible = "nvidia,tegra210-sor", },
1267         { .compatible = "nvidia,tegra210-sor1", },
1268         { .compatible = "nvidia,tegra210-vic", },
1269         { .compatible = "nvidia,tegra186-display", },
1270         { .compatible = "nvidia,tegra186-dc", },
1271         { .compatible = "nvidia,tegra186-sor", },
1272         { .compatible = "nvidia,tegra186-sor1", },
1273         { .compatible = "nvidia,tegra186-vic", },
1274         { /* sentinel */ }
1275 };
1276
1277 static struct host1x_driver host1x_drm_driver = {
1278         .driver = {
1279                 .name = "drm",
1280                 .pm = &host1x_drm_pm_ops,
1281         },
1282         .probe = host1x_drm_probe,
1283         .remove = host1x_drm_remove,
1284         .subdevs = host1x_drm_subdevs,
1285 };
1286
1287 static struct platform_driver * const drivers[] = {
1288         &tegra_display_hub_driver,
1289         &tegra_dc_driver,
1290         &tegra_hdmi_driver,
1291         &tegra_dsi_driver,
1292         &tegra_dpaux_driver,
1293         &tegra_sor_driver,
1294         &tegra_gr2d_driver,
1295         &tegra_gr3d_driver,
1296         &tegra_vic_driver,
1297 };
1298
1299 static int __init host1x_drm_init(void)
1300 {
1301         int err;
1302
1303         err = host1x_driver_register(&host1x_drm_driver);
1304         if (err < 0)
1305                 return err;
1306
1307         err = platform_register_drivers(drivers, ARRAY_SIZE(drivers));
1308         if (err < 0)
1309                 goto unregister_host1x;
1310
1311         return 0;
1312
1313 unregister_host1x:
1314         host1x_driver_unregister(&host1x_drm_driver);
1315         return err;
1316 }
1317 module_init(host1x_drm_init);
1318
1319 static void __exit host1x_drm_exit(void)
1320 {
1321         platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
1322         host1x_driver_unregister(&host1x_drm_driver);
1323 }
1324 module_exit(host1x_drm_exit);
1325
1326 MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
1327 MODULE_DESCRIPTION("NVIDIA Tegra DRM driver");
1328 MODULE_LICENSE("GPL v2");